Python debugger exits with error in Theia 1.7.0

[buvoli]

In my previous build of Theia (1.4.0) I was able to use the python debugger with the the vscode-python extension. In Theia 1.7.0 the debugger fails with an error. This issue is reproducible using the official python docker container theiaide/theia-python:latest

The following error message appears in the debug console:

Debugger Error: The number of constructor arguments in the derived class s must be >= than the number of constructor arguments of its base class.
Debugger Error: The number of constructor arguments in the derived class s must be >= than the number of constructor arguments of its base class.
Error
Error: The number of constructor arguments in the derived class s must be >= than the number of constructor arguments of its base class.
    at /home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:16:27311
    at Array.forEach ()
    at e (/home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:16:26875)
    at Object.t.plan (/home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:16:27386)
    at /home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:16:24044
    at e._get (/home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:16:23953)
    at e.get (/home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:16:22664)
    at s.get (/home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:68:141080)
    at new _ (/home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:1:269045)
    at /home/theia/plugins/vscode-python/extension/out/client/debugger/debugAdapter/main.js:1:272287

Steps to Reproduce:

1. start Theia python container: docker run -it --init -p 3000:3000 theiaide/theia-python:latest
2. Add a configuration for debugging a single file

{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Python: Current File",
      "type": "python",
      "request": "launch",
      "program": "${file}",
      "console": "integratedTerminal"
    }
  ]
}

3. Create a file hello.py with any code, then add a break point and start the debugger ( See Screenshot below)

Additional Information

• Operating System: Debian (Docker)
• Theia Version: 1.7.0

[appmlk]

the same as you 😫

[vince-fugnitto]

The following works correctly for me, when building this repository from sources:

Here is my python debugging configuration:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Python: Current File",
      "type": "python",
      "request": "launch",
      "program": "${file}",
      "console": "integratedTerminal"
    }
  ]
}

This issue is reproducible using the official python docker container theiaide/theia-python:latest

Please note these images are not "official", they are used as examples for application developers to create their own applications, and are used for continuous integration purposes. The readme for theia-apps reflects this: https://github.com/theia-ide/theia-apps#overview

Overview
This repository contains a collection of Theia-based IDE applications (both electron desktop apps and docker images) as examples, for demo and continuous-integration purposes.

[buvoli]

Could you clarify what you mean by "building from this repository"? I just cloned the repository https://github.com/theia-ide/theia-apps, cd into the directory theia-python-docker and built the image using docker build . -t theiaide/theia-python:latest. After I run the docker container and try to debug python, I still get the same error.

I also noticed from your screenshot the python version is 3.8.2, however if you run a fresh build of the container from the theia-apps repository you will get python version 3.8.3, so we are not testing the same thing.

[vince-fugnitto]

Could you clarify what you mean by "building from this repository"?

@buvoli this repository contains the sources for the theia framework, and I wanted to make sure that the use-case works correctly on master (as the #8754 (comment) suggests). As mentioned, the theia-apps repository is a collection of docker images and apps for example and continuous integration purposes. If there's an issue with one of the docker images (ex: python), an issue should be opened there instead of the framework: https://github.com/theia-ide/theia-apps/issues.

I also noticed from your screenshot the python version is 3.8.2, however if you run a fresh build of the container from the theia-apps repository you will get python version 3.8.3, so we are not testing the same thing.

A patch version should not break debugging functionality.

[djmaze]

There is now a suitable issue: theia-ide/theia-apps#441

[vince-fugnitto]

Closing as it has been moved to the theia-apps repository.